Fix typo and incorrect page number (#210)

* fix: Fix incorrect page numbers

* fix: Correct grammar

Author: hwahyeon

wiki/Documentation.md

@@ -111,7 +111,7 @@ and/or one of the other listed papers:
     *The `Bio.PDB` module is described here*
 
 4.  De Hoon MJ, Imoto S, Nolan J and Miyano S (2004) Open source clustering software.
-    [*Bioinformatics*, 20, 1454-1453](http://dx.doi.org/10.1093/bioinformatics/bth078)
+    [*Bioinformatics*, 20, 1453-1454](http://dx.doi.org/10.1093/bioinformatics/bth078)
 
     *The `Bio.Cluster` module is described here*
 

wiki/SourceCode.md

@@ -94,5 +94,5 @@ Most of the other [Open Bioinformatics Foundation](http://open-bio.org)
 projects migrated from CVS to SVN (Subversion), and later to git hosted
 at GitHub.
 
-While Biopython did considering moving from CVS to SVN, instead we
+While Biopython did consider moving from CVS to SVN, instead we
 migrated directly from CVS to git in September 2009.