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update pseudo code listing to use colons for loops
(template "introheader" was renamed to "task heading")
(update pseudo code listing to use colons for loops)
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'''let''' ''C'' = the output table (starts out empty)
'''for each''' row ''b'' '''in''' table ''B'' '''do:'''
'''place''' ''b'' '''in''' multimap ''M<sub>B</sub>'' under key ''b''(''j<sub>B</sub>'')
'''for each''' row ''a'' '''in''' table ''A'' '''do:'''
'''for each''' row ''b'' '''in''' multimap ''M<sub>B</sub>'' under key ''a''(''j<sub>A</sub>'')''':'''
'''let''' ''c'' = the concatenation of row ''a'' and row ''b''
'''place''' row ''c'' in table ''C''
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