* bin/erb (ARGV.switch, ERB::Main#run): allow variables to be set
from the command line. [ruby-core:65772] [Feature #10395]
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* lib/erb.rb (ERB#lineno): accessor for line number to eval.
* lib/erb.rb (ERB#location=): setter of file name and line number.
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"UTF-8" is invalid encoding name in Emacs, use "utf-8" instead.
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fixes#712. c.f. [ruby-dev:37516].
* lib/erb.rb (ERB::Compiler#compile): recognizes magic comments.
returns a pair of compiled script and its script encoding.
* lib/erb.rb (ERB#set_eoutvar): make generated scripts return a
string in correct encoding.
* lib/erb.rb (ERB#def_method): use Kernel#eval for encoding-awareness
of the evaluated string.
* bin/erb.rb (ERB::Main.run): adds -E and -U options.
String is no longer Enumerable.
* man/erb.1: new manapage.
* test/erb/test_erb_m17n.rb: new test case for m17n features.
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where tokens are not yilelded one by one.
* test/erb/test_erb.rb (TestERBCore#_test_01)
(TestERBCore#test_02_safe_04): The expected value should come
first for assert_equal().
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