Bugzilla 模板：[% 和 [%+] 有什么区别？
Bugzilla 模板中的代码通常由 [% 和 %] 分隔。但有时我会看到[%+和[%-]。有人可以解释其中的差异或向我指出合适的文档吗？这次谷歌让我失望了。
例如：
[%- event.value.subject FILTER html %]
或
[%+ END %]
Code in Bugzilla templates is usually delimited by [% and %]. But sometimes I see [%+ and [%-. Can someone explain the difference or point me at suitable documentation? Google has failed me on this occasion.
For example:
[%- event.value.subject FILTER html %]
or
[%+ END %]
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[%-（或-%]）删除前导（尾随）空格；[%+（或+%]）维护它。请参阅模板工具包手册中的 PRE_CHOMP、POST_CHOMP（Bugzilla 模板使用Template Toolkit）了解详细信息（包括[=和[~:)）。[%-(or-%]) removes leading (trailing) whitespace;[%+(or+%]) maintains it. See PRE_CHOMP, POST_CHOMP in the Template Toolkit Manual (Bugzilla templates use the Template Toolkit) for the gory details (including[=and[~:)).以下是我去年为我们团队写的内容：
我对 TT 行为的了解比我应有的要少，而我们团队的另一名成员向我承认，他比我更了解！
这是对咀嚼工作原理的简要说明。
假设我有以下模板，其中变量 x = 'foo'
将变为
注意第二行开头的空格。
TT 具有 PRE_CHOMP 和 POST_CHOMP 的配置设置。
如果 PRE_CHOMP 为 1，则删除指令前面的所有空格（包括换行符）。该示例变为
如果 POST_CHOMP 为 1，则另一端发生相反的情况：
如果 PRE/POST_CHOMP 为 2，则所有前面/后面的空格将折叠为单个空格：
如果 PRE/POST_CHOMP 为 3，则所有前面/后面的空格已消除：
==重要==
Bugzilla 配置为 PRE_CHOMP = 1。未设置 POST_CHOMP。
您可以在“[%”之后或“%]”之前使用字符 -、=、~ 和 + 之一明确表示咀嚼行为。 '-' 表示 CHOMP 级别 1，= 表示 CHOMP 级别 2，~ 表示 CHOMP 级别 3，+ 表示无论整体配置中是否设置，均不进行 chomping。
重复这个例子：
因为我们有 PRE_CHOMP = 1，所以这将变成
; foo
变成
foo最后，
变成
对于更详细的解释，请执行 'perldoc Template::Manual::Config' 并搜索对于 CHOMP。
Here's something I wrote for our team last year:
I was less informed about TT's behavior than I should have been, and another member of our team has confessed to me that he was even less informed than I was!
This is a brief explanation of how chomping works.
Suppose I have the following template, with the variable x = 'foo'
will become
Note the spaces at the beginning of the second line.
TT has configuration settings for PRE_CHOMP and POST_CHOMP.
If PRE_CHOMP is 1, then all the whitespace in front of a directive, including a newline, is removed. The example becomes
If POST_CHOMP is 1, then the opposite occurs on the other end:
If PRE/POST_CHOMP is 2, then all preceding/succeeding whitespace is collapsed to a single space:
If PRE/POST_CHOMP is 3, then all preceding/succeeding whitespace is eliminated:
==IMPORTANT==
Bugzilla is configured with PRE_CHOMP = 1. POST_CHOMP is not set.
You can explicitly denote chomping behavior with one of the characters -, =, ~, and + after the '[%' or before the '%]'. '-' denotes CHOMP level 1, = denotes CHOMP level 2, ~ denotes CHOMP level 3, + denotes no chomping regardless of whether it is set in the overall configuration.
So to repeat the example:
Because we have PRE_CHOMP = 1, then this will become
becomes
becomes
<td> foo </td>becomes
<td>foo</td>Finally,
becomes
For an even more verbose explanation, do 'perldoc Template::Manual::Config' and search for CHOMP.