Update shell_cheatsheet.md

diff --git a/shell_cheatsheet.md b/shell_cheatsheet.md
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+++ b/shell_cheatsheet.md
@@ -170,13 +170,13 @@ continues the loop as long as the value in the variable COUNTER is less than 10
 |-----------------|-------------|
 | `grep [options] day haiku.txt` | finds every instance of the string `day` in the file haiku.txt and pipes it to standard output |  
 
-| grep options |  |
-|--------------|--|
+| grep options |                                                                                                                                                                                                              |  
+|--------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|  
 | `-E` | tells grep you will be using a regular expression. Enclose the regular expression in quotes. _Note:_ the power of `grep` comes from using regular expressions. Please see the regular expressions sheet for examples |  
 | `-i` | makes matching case-insensitive |  
 | `-n` | limits the number of lines that match to the first n matches |  
 | `-v` | shows lines that do not match the pattern (inverts the match) |  
-| `-w` | outputs instances where the pattern is a whole word |
+| `-w` | outputs instances where the pattern is a whole word |  
 
 ### b) How to find files with certain properties...
 * **`find . -type d` -->