Standardize commands inside backticks

Remove whitespace

CONTRIBUTING.md

@@ -10,7 +10,7 @@ things in mind before submitting your pull request:
 
 * Work on the latest possible state of **mruby/master**
 * Create a branch which is dedicated to your change
-* Test your changes before creating a pull request (```rake test```)
+* Test your changes before creating a pull request (`rake test`)
 * If possible write a test case which confirms your change
 * Don't mix several features or bug-fixes in one pull request
 * Create a meaningful commit message

doc/guides/compile.md

@@ -138,18 +138,18 @@ C Compiler has header searcher to detect installed library.
 If you need an include path of header file use `search_header_path`:
 
 ```ruby
-# Searches ```iconv.h```.
+# Searches `iconv.h`.
 # If found it will return include path of the header file.
-# Otherwise it will return nil .
+# Otherwise it will return nil.
 fail 'iconv.h not found' unless conf.cc.search_header_path 'iconv.h'
 ```
 
 If you need a full file name of header file use `search_header`:
 
 ```ruby
-# Searches ```iconv.h```.
+# Searches `iconv.h`.
 # If found it will return full path of the header file.
-# Otherwise it will return nil .
+# Otherwise it will return nil.
 iconv_h = conf.cc.search_header 'iconv.h'
 print "iconv.h found: #{iconv_h}\n"
 ```

doc/guides/mrbgems.md

@@ -55,8 +55,8 @@ conf.gem mgem: 'mruby-redis', checksum_hash: '3446d19fc4a3f9697b5ddbf2a904f301c4
 If there are missing dependencies, mrbgem dependencies solver will reference
 mrbgem from the core or mgem-list.
 
-To pull all gems from remote GIT repository on build, call ```rake -p```,
-or ```rake --pull-gems```.
+To pull all gems from remote GIT repository on build, call `rake -p`,
+or `rake --pull-gems`.
 
 NOTE: `:bitbucket` option supports only git. Hg is unsupported in this version.