Merge pull request #990 from tldr-pages/expand-tree.md

tree.md: add more useful examples

pages/common/tree.md

@@ -1,27 +0,0 @@
-# tree
-
-> Show the contents of the current directory as a tree.
-
-- Show files and directories with a depth of 'num' (where 1 means the current directory):
-
-`tree -L {{num}}`
-
-- Show directories only:
-
-`tree -d`
-
-- Show hidden files too:
-
-`tree -a`
-
-- Print human readable size of files:
-
-`tree -h`
-
-- Print the full path for each file:
-
-`tree -f`
-
-- Print the tree without lines and indentation. Useful when used with -f:
-
-`tree -i`