Regular Expression

RegEx

1. 
Match the content in brace 
(?<=\().*(?=\))
Test Example : hk 
**ReinforceHotKeyRep.ahk (D:\Program Files\ALTRun\AHK) - GVIM

2.

Use the zero-width to mark the boundray of the word, it a good way to search.

3. Notice the escape char.

C\:\\

Group Catch, notice the \2 at the second part

:%s/*\d\{2\} .*/\2:/g

Insert the in double line

OR, Greedy

v/\<add\|<set\|para.\{-}=/dbo