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[Scheme-reports] Formal Comment: Change syntax of symbols from |<symbol element>*| to #"<string element>*"

Formal Comment
Submitter's Name: Arthur Smyles
Submitter's Email Address: atsmyles at verizon.net
Draft Version of Report: 6th
Section of draft R7RS: 7.1.1. Lexical structure
Change syntax of symbols from |<symbol element>*| to #"<string element>*"
Full Description:
The vertical line character is being proposed as a syntax for literal symbols. This symbol however is used by SCSH to represent shell-style pipes. the backslash is also being used for the same purpose (which is currently used by Gambit for infix notation).Also the <symbol element> and <string element> production are practically identical only differing because of the quote symbol used. 
This proposal will allow freeing the | and \ characters for future use and eliminate <symbol element> production from the syntax.

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