如下所示，所有释义中的每一行都是未完成的。段落中每行开头的单词不是上一行的延续。我感兴趣的是将释义中的所有行连接起来，而没有任何单词中断。
When the water rises up to F, the piece at A will be visible; when it
reaches G, both A and B will be visible; and when it comes up to H,
all three pieces will be visible.
_Artificial Earthquake and Volcano._
Grind an equal quantity of fresh iron filings with pure sulphur, till
the whole be reduced to a fine powder. Be careful not to let any wet
come near it. Then bury about thirty pounds of it a foot deep in the
earth, and in about six or eight hours the ground will heave and
swell, and shortly after send forth smoke and flames like a burning
mountain. If the earth is raised in a conical shape, it will be no bad
miniature resemblance of one of the burning mountains.
_Artificial Illuminations._
A very pleasing exhibition may be made with very little trouble or
expense, in the following manner: Provide a box, which you fit up with
architectural designs cut out on pasteboard; prick small holes in
those parts of the building where you wish the illuminations to
appear, observing, that in proportion to the perspective, the holes
are to be made smaller; and on the near objects the holes are to be
made larger. Behind these designs thus perforated, you fix a lamp or
candle, but in such a manner that the reflection of the light shall
only shine through the holes; then placing a light of just sufficient
brilliance to show the design of the buildings before it, and making a
hole for the sight at the front end of the box, you will have a very
tolerable representation of illuminated buildings.
输出
When the water rises up to F, the piece at A will be visible; when it reaches G, both A and B will be visible; and when it comes up to H, all three pieces will be visible.
_Artificial Earthquake and Volcano._
Grind an equal quantity of fresh iron filings with pure sulphur, till the whole be reduced to a fine powder. Be careful not to let any wet come near it. Then bury about thirty pounds of it a foot deep in the earth, and in about six or eight hours the ground will heave and swell, and shortly after send forth smoke and flames like a burning mountain. If the earth is raised in a conical shape, it will be no bad miniature resemblance of one of the burning mountains.
_Artificial Illuminations._
A very pleasing exhibition may be made with very little trouble or expense, in the following manner: Provide a box, which you fit up with architectural designs cut out on pasteboard; prick small holes in those parts of the building where you wish the illuminations to appear, observing, that in proportion to the perspective, the holes are to be made smaller; and on the near objects the holes are to be made larger. Behind these designs thus perforated, you fix a lamp or candle, but in such a manner that the reflection of the light shall only shine through the holes; then placing a light of just sufficient brilliance to show the design of the buildings before it, and making a hole for the sight at the front end of the box, you will have a very tolerable representation of illuminated buildings.
我的正则表达式效果不太好：
寻找：^(.*?)$(\K.*)\r
替换为：\2
或（更好的一个）
寻找：^(.*?)$(\R)
替换为：\1
答案1
使用 Notepad++，它可能与 SublimeText 兼容。
- Ctrl+H
- 找什么：
\R+_.+_\R+(*SKIP)(*FAIL)|\R - 替换为：
# 一个空格 - 打钩 环绕
- 选择 正则表达式
- 取消勾选
. matches newline - Replace all
解释：
\R+ # 1 or more any kind of linebreak
_.+_ # 1 or more any character surounded by underscores
\R+ # 1 or more any kind of linebreak
(*SKIP) # skip this match
(*FAIL) # and considere it failed
| # OR
\R # any kind of linebreak
截图（之前）：
截图（之后）：
答案2
一个非常简单且有用的正则表达式公式：
寻找： ([^\r\n])\R([^\r\n])
替换为： \1 \2
答案3
- Ctrl+H
- 找什么：
\R(?=.) - 用。。。来代替：
(leave empty) - 查看 环绕
- 查看 正则表达式
- 取消选中
. matches newline - Replace all