Find: cleanup examples for running a command

Need the extra space after `{}` so syntax highlighting works.

common/find.md

@@ -9,12 +9,9 @@
 - run a command for each file
 - use {} within the command to access the filename
 
-`find {{root_path}} -name {{'*.py'}} -exec {{command}} \;`
+`find {{root_path}} -name {{'*.py'}} -exec {{wc -l {} }}\;`
+`find {{root_path}} -name {{'*.py'}} -exec {{rm {} }}\;`
 
 - find files modified since a certain time
 
 `find {{root_path}} -name {{'*.py'}} -mtime {{-1d}}`
-
-- remove files recursively
-
-`find {{root_path}} -name {{'*.py'}} -exec rm {} \;`