在groff中逃脱点

Question

根据info groff(第5.11节字符翻译), \.应该只打印点.然而,这似乎并非如此.如果我渲染此联机帮助页

.TH x x x x
\.SH foo

我被foo渲染为一个部分标题,并.SH没有打印.

那么,为什么会发生这种情况,如何在groff线的开始处逃避点(和撇号)？

Answer 1

要在行开头使用时转义点\[char46]:

\[char46]SH foo

版画

.SH foo

这是预期的行为,但应在手册页中修复.这是一个错误报告.

您可以在下面阅读\\(缩短的)和\. (来自信息页面)的说明.

-- Escape: \\
[...]

`\\' is a `delayed' backslash; more precisely, it is the default
escape character followed by a backslash, which no longer has
special meaning due to the leading escape character. It is _not_
an escape sequence in the usual sense! In any unknown escape
sequence `\X' the escape character is ignored and X is printed.
But if X is equal to the current escape character, no warning is
emitted.

As a consequence, only at top-level or in a diversion a backslash
glyph is printed; in copy-in mode, it expands to a single
backslash which then combines with the following character to an
escape sequence.

[...]

-- Escape: \.
Similar to `\\', the sequence `\.' isn't a real escape sequence.
As before, a warning message is suppressed if the escape character
is followed by a dot, and the dot itself is printed.

Answer 2

只需在点前加上一个零宽度字符：

\&. -- this a a dot.

或暂时切换到另一个控制字符：

.cc #
. -- this is a dot.
#cc