Merge pull request #1000 from HaoZeke/fixDocs

docs: Fix sneaky unicode character

doc/src/Developer/developer.tex

@@ -476,7 +476,7 @@ is the name of the class. This code allows LAMMPS to find your fix
 when it parses input script. In addition, your fix header must be
 included in the file "style\_fix.h". In case if you use LAMMPS make,
 this file is generated automatically - all files starting with prefix
-fix\_ are included, so call your header the same way. Otherwise, donÕt
+fix\_ are included, so call your header the same way. Otherwise, don't
 forget to add your include into "style\_fix.h".
 
 Let's write a simple fix which will print average velocity at the end