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--- index.md
+++ index.md
## Convert to lowercase
- :%s/.*/\L&/
+ :%s/.*/\L&/
## Join all lines
## Insert the sum of a list of numbers after an arbitrary number of lines
-1) mark the first line: `mk`
-2) mark the last line: `ml`
+(1) mark the first line: `mk`
+(2) mark the last line: `ml`
<pre>
:'k,'l!awk 'END{print "<em>total:</em>", i}{i+=$1; print}'