Implements color output in GNU Screen sessions (issue 277).
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		@@ -2592,6 +2592,7 @@ bool ShouldUseColor(bool stdout_is_tty) {
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        String::CStringEquals(term, "xterm") ||
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        String::CStringEquals(term, "xterm-color") ||
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        String::CStringEquals(term, "xterm-256color") ||
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        String::CStringEquals(term, "screen") ||
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        String::CStringEquals(term, "linux") ||
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        String::CStringEquals(term, "cygwin");
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    return stdout_is_tty && term_supports_color;
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@@ -6264,8 +6264,17 @@ TEST(ColoredOutputTest, UsesColorsWhenTermSupportsColors) {
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  SetEnv("TERM", "xterm-color");  // TERM supports colors.
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  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
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  SetEnv("TERM", "xterm-256color");  // TERM supports colors.
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  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
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  SetEnv("TERM", "screen");  // TERM supports colors.
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  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
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  SetEnv("TERM", "linux");  // TERM supports colors.
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  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
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  SetEnv("TERM", "cygwin");  // TERM supports colors.
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  EXPECT_TRUE(ShouldUseColor(true));  // Stdout is a TTY.
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#endif  // GTEST_OS_WINDOWS
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}
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