groff中的轉義點

Question

根據info groff（5.11節中的字符轉換）， \.應該只打印點。但是，這不是看起來發生的事情。 如果我使這個手冊頁

.TH x x x x 
\.SH foo 

我得到呈現爲節標題foo，而不是打印.SH。

那麼，爲什麼會發生這種情況，以及如何避免在groff中起始行的 點（和撇號）？

Answer 1

要在行寫入使用\[char46]年初逃脫點：

\[char46]SH foo 

打印

.SH foo 

這是預期的行爲，但應固定在手冊頁。 Here是一個錯誤報告。

您可以在下面閱讀\\（縮寫） 和\.（來自信息頁）的說明。

-- 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

只需預先設置點與零寬度字：

\&. -- this a a dot. 

或暫時切換到另一個控制字符：

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