Update CONTRIBUTING.md

CONTRIBUTING.md

@@ -1,18 +1,18 @@
 # Contributing
 
-In the spirit of [free software][1], **everyone** is encouraged to help improve this project.
+In the spirit of free software, **everyone** is encouraged to help improve this project.
 
 Here are some ways *you* can contribute:
 
 * by using prerelease versions
-* by reporting [bugs][2]
+* by reporting bugs
 * by suggesting new features
-* by writing [translations][3]
+* by writing translations
 * by writing or editing documentation
 * by writing specifications
 * by writing code (*no patch is too small*: fix typos, add comments, clean up inconsistent whitespace)
 * by refactoring code
-* by resolving [issues][2]
+* by resolving issues
 * by reviewing patches
 
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