Ligatures rendered inside code elements

## Description

A _ligature_ is a typographer&rsquo;s solution to the blurring effect of juxtaposing certain characters. For example, in `fi` the bar of the `f` can occlude the dot of the `i`, so the character pair is replaced with a ligature &ndash; a glyph &ndash; representing their fusion. 

This aid to legibility has no place in fixed-width typefaces, and by replacing two characters with one, damages horizontal alignment. 

The Markdown `terrific official flat fissures` renders in MkDocs with ligatures for `fi`, `ff` and `fl`. 

![ligatures](https://cloud.githubusercontent.com/assets/20816256/26038191/72c4b15a-38fa-11e7-9cbe-4a6c235c3869.png)

A similar effect can be observed in the fenced code block. Also see online at [code.kx.com](code.kx.com/q/interfaces/j-client-for-q/#primitive-datatypes). 


### Expected behavior

The text rendered without ligatures

### Actual behavior

The text rendered with ligatures

### Steps to reproduce the bug

1. Include `terrific official flat fissures` in a Markdown source file. 
2. Compile in MkDocs and inspect result in Chrome or Safari browsers

### Notes

Source files for this MkDocs project are online at GitHub: [KxSystems/docs](https://github.com/kxsystems/docs).

The bug does not appear when Chrome or Safari render the attached file ligature.txt.

[ligatures.txt](https://github.com/squidfunk/mkdocs-material/files/999764/ligatures.txt)

The bug does not appear when Chrome or Safari render 

```
<html>
    <head>
        <title>Ligatures</title>
    </head>
    <body>
        <pre>terrific official flat fissures</pre> 
    </body>
</html>
````

The bug disappears when you comment out in the YML: `theme: 'material'`.

The bug survives commenting out in the YML:

* all the stylesheets under `extra_css`
* all the scripts under `extra_javascript`
* all the extensions under `markdown_extensions`

### Package versions

* Python: 2.7.10
* MkDocs: 0.16.1
* Material: 1.6.1

### Project configuration

``` yaml
copyright: "&copy;1993-2017 Kx Systems, Inc. Kx&reg; and kdb+ are registered trademarks of Kx Systems, Inc., a subsidiary of First Derivatives plc."
dev_addr: '0.0.0.0:8000'
docs_dir: 'docs'
extra_css: 
  - stylesheets/extra.css
extra_javascript: 
  - 'https://code.jquery.com/jquery-3.1.1.min.js'
  - 'https://use.fontawesome.com/3dbf29ed12.js'
  - scripts/fdtracker.js
  - scripts/googleanalytics.js
  - scripts/theme.js
  - 'https://cdn.mathjax.org/mathjax/latest/MathJax.js?config=TeX-MML-AM_CHTML'
markdown_extensions:
    - admonition
    - codehilite(guess_lang=false)
    - extra
    - fenced_code
    - fontawesome_markdown
    - pymdownx.arithmatex
    # - pymdownx.betterem(smart_enable=all)
    # - pymdownx.caret
    # - pymdownx.critic
    # - pymdownx.emoji:
        # emoji_generator: !!python/name:pymdownx.emoji.to_svg
    # - pymdownx.inlinehilite
    - pymdownx.magiclink
    - pymdownx.mark
    # - pymdownx.smartsymbols
    - pymdownx.superfences
    # - pymdownx.tasklist(custom_checkbox=true)
    # - pymdownx.tilde
    - toc(permalink=true)
site_dir: 'site'
site_author: 'Kx Systems'
site_description: Resources for kdb+ programmers
site_favicon: './img/favicon.ico'
# config.site_name: 'code.kx.com'
site_name: 'code.kx.com'
site_url: 'http://code.kx.com'
remote_branch: 'master'
# repo_name: 'GitHub'
# repo_url: 'https://github.com/kxsystems/docs'
theme: 'material'
# theme_dir for favicon
#theme_dir: 'theme'
extra:
  logo: 'img/kx.jpeg'
  palette: 
    primary: 'blue'
    accent: 'deep orange'
  # version: '0.1.0'
pages:
  - Home: index.md
  - Get started: learn.md
  - Reference card: ref/card.md
  - Reference: 
    - Adverbs: ref/adverbs.md
    - Command line: ref/cmdline.md
    - Datatypes: ref/datatypes.md
    - Debugging: ref/debug.md
    - Elements: ref/elements.md
    - Errors: ref/error-list.md
    - Glossary: ref/glossary.md
    - IPC protocol: ref/ipc.md
    - Releases:
      - Changes in 3.5: ref/releases/ChangesIn3.5.md
      - Changes in 3.4: ref/releases/ChangesIn3.4.md
      - Changes in 3.3: ref/releases/ChangesIn3.3.md
      - Changes in 3.2: ref/releases/ChangesIn3.2.md
      - Changes in 3.1: ref/releases/ChangesIn3.1.md
      - Changes in 3.0: ref/releases/ChangesIn3.0.md
      - Changes in 2.8: ref/releases/ChangesIn2.8.md
      - Changes in 2.7: ref/releases/ChangesIn2.7.md
      - Changes in 2.6: ref/releases/ChangesIn2.6.md
      - Changes in 2.5: ref/releases/ChangesIn2.5.md
      - Changes in 2.4: ref/releases/ChangesIn2.4.md
      - Withdrawn: ref/withdrawn.md
    - Semantics:
      - Arithmetic (integer): ref/arith-integer.md
      - Arithmetic (float): ref/arith-float.md
      - Casting & encoding: ref/casting.md
      - Comparison: ref/comparison.md
      - Database: ref/database.md
      - Dictionaries & tables: ref/dictsandtables.md
      - Enumeration: ref/enums.md
      - Environment: ref/environment.md
      - Evaluation control: ref/control.md
      - Error handling: ref/errors.md
      - Files (numbers): ref/filenumbers.md
      - Files (words): ref/filewords.md
      - Functional SQL: ref/funsql.md
      - Joins: ref/joins.md
      - Lists: ref/lists.md
      - Logic: ref/logic.md
      - Markup: ref/markup.md
      - Matrixes: ref/matrixes.md
      - Metadata: ref/metadata.md
      - OS: ref/os.md
      - Parallel processing: ref/peach.md
      - Parse trees: ref/parsetrees.md
      - Q-SQL: ref/qsql.md
          #   - exec: ref/exec.md
      - Randomness: ref/random.md
      - Search: ref/search.md
      - Selection: ref/select.md
      - Sort: ref/sort.md
      - Statistics (aggregates): ref/stats-aggregates.md
      - Statistics (moving): ref/stats-moving.md
      - Strings: ref/strings.md
      - Trigonometry: ref/trig.md
      - Unclassified: ref/unclassified.md
    - Syntax: ref/syntax.md
    - System commands: ref/syscmds.md
    - Utilities:
      - Developer tools: ref/devtools.md
      - .z namespace: ref/dotz.md
      - .Q namespace: ref/dotq.md
      - .h namespace: ref/doth.md
      - Internal functions: ref/internal.md
  - Tutorials:
    - Dictionaries & tables: tutorials/dictsandtables.md
    - Q by examples: tutorials/q-by-examples.md
    - Starting q:
      - 1. Introduction: tutorials/startingq/introduction.md
      - 2. Language: tutorials/startingq/language.md
      - 3. IPC: tutorials/startingq/ipc.md
      - 4. Tables: tutorials/startingq/tables.md
      - 5. HDB: tutorials/startingq/hdb.md
      - 6. Kdb+tick: tutorials/startingq/tick.md
  - Interfaces: interfaces.md
  - Interfaces:
    - Q client for Bloomberg: interfaces/q-client-for-bloomberg.md # bloomberg-feed-handler.md
    - C client for q: interfaces/c-client-for-q.md # interfacing-with-c.md
    - Using C/C++ functions: interfaces/using-c-functions.md # extending-with-c.md
    - C# client for q: interfaces/csharp-client-for-q.md # interfacing-with-csharp.md
    - Excel client for q: interfaces/excel-client-for-q.md # cookbook/interfacing-with-excel.md
    - GPUs: interfaces/gpus.md # cookbook/interfacing-with-gpus.md
    - J client for q: interfaces/j-client-for-q.md # cookbook/q-server-for-j.md
    - Q client for J: interfaces/q-client-for-j.md # cookbook/j-server-for-q.md
    - Java client for q: interfaces/java-client-for-q.md # cookbook/interfacing-with-java.md
    - Matlab client for q: interfaces/matlab-client-for-q.md # cookbook/interfacing-with-matlab.md
    - Q server for ODBC: interfaces/q-server-for-odbc.md # cookbook/odbc-qserver.md
    - Q server for ODBC3: interfaces/q-server-for-odbc3.md # cookbook/odbc3-qserver.md
    - Q client for ODBC: interfaces/q-client-for-odbc.md # cookbook/odbc-qclient.md
    - Perl client for q: interfaces/perl-client-for-q.md # cookbook/interfacing-with-perl.md
    - Python client for q: interfaces/python-client-for-q.md # cookbook/interfacing-with-python.md
    - Using q with R: interfaces/with-r.md
    - Scala client for q: interfaces/scala-client-for-q.md # cookbook/interfacing-with-scala.md
  - Cookbook:
    - Introduction: cookbook/introduction.md
    - Alternative in-memory layouts: cookbook/alternative-in-memory-layouts.md
    - Authentication and access: cookbook/authentication.md
    - Bulk Copy Program: cookbook/bcp.md
    - Callbacks: cookbook/callbacks.md
    - Chained tickerplant: cookbook/chained-tickerplant.md
    - Client-server: cookbook/client-server.md
    - Compacting HDB sym: cookbook/compacting-hdb-sym.md
    - Corporate actions: cookbook/corporate-actions.md
    - Custom web server: cookbook/custom-web.md
    - Daemon: cookbook/daemon.md
    - FAQ: cookbook/faq.md
    - FAQ from k4 listbox: cookbook/faq-listbox.md
    - File compression: cookbook/file-compression.md
    - Firewalling: cookbook/firewalling.md
    - Geospatial: cookbook/geospatial.md
    - inetd/xinetd: cookbook/inetd.md
    - Interprocess communication: cookbook/ipc.md
    - Kdb+tick configuration: cookbook/kdb-tick.md
    - Linking columns: cookbook/linking-columns.md
    - Linux production notes: cookbook/linux-production.md
    - Load balancing: cookbook/load-balancing.md
    - Loading from large files: cookbook/loading-from-large-files.md
    - Logging: cookbook/logging.md
    - Multithreaded input: cookbook/multithreaded-input.md
    - Named pipes: cookbook/named-pipes.md
    - ODBC: cookbook/odbc.md
    - Performance tips: cookbook/performance-tips.md
    - Precision: cookbook/precision.md
    - Pivoting tables: cookbook/pivoting-tables.md
    - Programming examples: cookbook/programming-examples.md
    - Programming idioms: cookbook/programming-idioms.md
    - Publish and subscribe: cookbook/publish-subscribe.md
    - Server calling client: cookbook/server-calling-client.md
    - Splayed schema change: cookbook/splayed-schema-change.md
    - Splayed tables: cookbook/splayed-tables.md
    - Splaying large files: cookbook/splaying-large-files.md
    - SSL/TLS: cookbook/ssl.md
    - Regular expressions: cookbook/regex.md
    - Temporal data: cookbook/temporal-data.md
    - Timezones: cookbook/timezones.md
    - Unicode: cookbook/unicode.md
    - Unit tests: cookbook/unit-tests.md
    - Using .z: cookbook/using-dotz.md
    - Write-only RDB: cookbook/w-q.md
    - WebSockets: cookbook/websockets.md
    - Windows Service: cookbook/windows-service.md
  - Developer: developer.md
  - GitHub: github.md
  - Q for Mortals 3: qformortals3.md
  - Archive: archive.md
  - About: 
    - This site: about/thissite.md
    - Kx technology: about/kxtechnology.md
    - Terms & conditions: about/TermsAndConditions.md
```

### System information

* OS: macOS 10.12.4
* Browser: Chrome 58.0.3029.110 (64-bit); Safari  10.1 (12603.1.30.0.34




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Ligatures rendered inside code elements #323

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Ligatures rendered inside code elements #323

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Description

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Notes

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