Add a space between "convert encoding" and (dry run)/(not dry run)

pages/common/convmv.md

@@ -2,10 +2,10 @@
 
 > Converts filenames from one encoding to another
 
-- convert encoding(dry run)
+- convert encoding (dry run)
 
 `convmv -f {{from_encoding}} -t {{to_encoding}} {{input_file}}`
 
-- convert encoding(not dry run)
+- convert encoding (not dry run)
 
 `convmv -f {{from_encoding}} -t {{to_encoding}} --notest {{input_file}}`