--- a/replace_text_in_column.xml	Thu Jan 08 09:07:31 2015 -0500
+++ b/replace_text_in_column.xml	Sat Jan 17 08:30:15 2015 -0500
@@ -21,7 +21,7 @@
         <param format="tabular" name="infile" type="data" label="File to process" />
         <param name="column" label="in column" type="data_column" data_ref="infile" accept_default="true" />
 
-        <param name="find_pattern" type="text" size="20" label="Find pattern" help="Use simple text, or a valid regular expression (without backslashes // ) " > 
+        <param name="find_pattern" type="text" size="20" label="Find pattern" help="Use simple text, or a valid regular expression (without backslashes // ) " >
             <sanitizer>
                 <valid initial="string.printable">
                     <remove value="&apos;"/>
@@ -94,7 +94,7 @@
 
 **Example 2**
 
-**Find Pattern:** ^(.{4}) 
+**Find Pattern:** ^(.{4})
 **Replace Pattern:** &\\t
 
 Find the first four characters in each line, and replace them with the same text, followed by a tab character. In practice - this will split the first line into two columns. This operation affects only the selected column.
@@ -104,7 +104,7 @@
 
 **Extened Regular Expression Syntax**
 
-The select tool searches the data for lines containing or not containing a match to the given pattern. A Regular Expression is a pattern descibing a certain amount of text. 
+The select tool searches the data for lines containing or not containing a match to the given pattern. A Regular Expression is a pattern descibing a certain amount of text.
 
 - **( ) { } [ ] . * ? + \ ^ $** are all special characters. **\\** can be used to "escape" a special character, allowing that special character to be searched for.
 - **^** matches the beginning of a string(but not an internal line).
@@ -112,8 +112,8 @@
 - **{** n or n, or n,m **}** specifies an expected number of repetitions of the preceding pattern.
 
   - **{n}** The preceding item is matched exactly n times.
-  - **{n,}** The preceding item ismatched n or more times. 
-  - **{n,m}** The preceding item is matched at least n times but not more than m times. 
+  - **{n,}** The preceding item ismatched n or more times.
+  - **{n,m}** The preceding item is matched at least n times but not more than m times.
 
 - **[** ... **]** creates a character class. Within the brackets, single characters can be placed. A dash (-) may be used to indicate a range such as **a-z**.
 - **.** Matches any single character except a newline.
@@ -121,10 +121,10 @@
 - **?** The preceding item is optional and matched at most once.
 - **+** The preceding item will be matched one or more times.
 - **^** has two meaning:
-  - matches the beginning of a line or string. 
+  - matches the beginning of a line or string.
   - indicates negation in a character class. For example, [^...] matches every character except the ones inside brackets.
 - **$** matches the end of a line or string.
-- **\|** Separates alternate possibilities. 
+- **\|** Separates alternate possibilities.
 
 
 **Note**: AWK uses extended regular expression syntax, not Perl syntax. **\\d**, **\\w**, **\\s** etc. are **not** supported.