Fix small check.py errors

swcarpentry · May 14, 2015 · 0119051 · 0119051
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diff --git a/discussion.md b/discussion.md
@@ -3,7 +3,7 @@ layout: page
 title: The Unix Shell
 subtitle: Discussion
 ---
-### Other Shells
+## Other Shells
 
 Before Bash became popular in the end of nineties,
 scientists widely used (and some still use) another shell, C-shell, or Csh.

diff --git a/index.md b/index.md
@@ -24,7 +24,7 @@ These lessons will start you on a path towards using these resources effectively
 > searching for files with `grep` and `find`, and writing simple loops
 > and scripts, you probably won't learn much from this lesson.
 
-> ## Getting ready {.prereq}
+> ## Getting ready {.getready}
 >
 > You need to download some files to follow this lesson:
 > 

diff --git a/reference.md b/reference.md
@@ -99,7 +99,7 @@ argument
     The term is often used interchangeably (and inconsistently) with [parameter](#parameter).
 
 command shell
-:   FIXME
+:   See [shell](#shell)
 
 command-line interface
 :   An interface based on typing commands,