[Pig Wiki] Trivial Update of "ParameterSubstitution" by CharlieGroves

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The following page has been changed by CharlieGroves:
http://wiki.apache.org/pig/ParameterSubstitution

The comment on the change is:
little formatting fixes, no content updates

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  ==  Motivation ==
  
- This document describes a proposal for implementing parameter substitution in pig. This proposal is motivated by multiple requests from the who would like to create a template pig script and then used it with different parameters on a regular basis. For instance, if you have daily processing that is identical every day except the data it needs to process, it would be very convenient to put a placeholder for the date and provide the actual value at run time.
+ This document describes a proposal for implementing parameter substitution in pig. This proposal is motivated by multiple requests from users who would like to create a template pig script and then use it with different parameters on a regular basis. For instance, if you have daily processing that is identical every day except the date it needs to process, it would be very convenient to put a placeholder for the date and provide the actual value at run time.
  
  == Requirements ==
  
- 1. Ability to have parameters within a pig script and provide values for this parameters at run time.
+  1. Ability to have parameters within a pig script and provide values for this parameters at run time.
- 2. Ability to provide parameter values on the command file
+  2. Ability to provide parameter values on the command file
- 3. Ability to provide parameter values in a file
+  3. Ability to provide parameter values in a file
- 4. Ability to generate parameter value at run time by running a binary or script.
+  4. Ability to generate parameter value at run time by running a binary or script.
- 5. Ability to provide default values for parameters
+  5. Ability to provide default values for parameters
- 6. Ability to retain the script with all parameters resolved. This is mostly for debugging purposes.
+  6. Ability to retain the script with all parameters resolved. This is mostly for debugging purposes.
  
  == Interface ==