Source sweep: Use cmStrCat for string concatenation

This patch is generated by a python script that uses regular expressions to
search for string concatenation patterns of the kind

```
std::string str = <ARG0>;
str += <ARG1>;
str += <ARG2>;
...
```

and replaces them with a single `cmStrCat` call

```
std::string str = cmStrCat(<ARG0>, <ARG1>, <ARG2>, ...);
```

If any `<ARGX>` is itself a concatenated string of the kind

```
a + b + c + ...;
```

then `<ARGX>` is split into multiple arguments for the `cmStrCat` call.

If there's a sequence of literals in the `<ARGX>`, then all literals in the
sequence are concatenated and merged into a single literal argument for
the `cmStrCat` call.

Single character strings are converted to single char arguments for
the `cmStrCat` call.

`std::to_string(...)` wrappings are removed from `cmStrCat` arguments,
because it supports numeric types as well as string types.

`arg.substr(x)` arguments to `cmStrCat` are replaced with
`cm::string_view(arg).substr(x)`

1 files changed, 3 insertions, 2 deletions

diff --git a/Source/cmCurl.cxx b/Source/cmCurl.cxx
index 0004f66..233790e 100644
--- a/Source/cmCurl.cxx
+++ b/Source/cmCurl.cxx
@@ -7,6 +7,7 @@
 #  define CMAKE_FIND_CAFILE
 #  include "cmSystemTools.h"
 #endif
+#include "cmStringAlgorithms.h"
 
 // curl versions before 7.21.5 did not provide this error code
 #if defined(LIBCURL_VERSION_NUM) && LIBCURL_VERSION_NUM < 0x071505
@@ -72,8 +73,8 @@ std::string cmCurlSetNETRCOption(::CURL* curl, const std::string& netrc_level,
     } else if (netrc_level == "IGNORED") {
       curl_netrc_level = CURL_NETRC_IGNORED;
     } else {
-      e = "NETRC accepts OPTIONAL, IGNORED or REQUIRED but got: ";
-      e += netrc_level;
+      e = cmStrCat("NETRC accepts OPTIONAL, IGNORED or REQUIRED but got: ",
+                   netrc_level);
       return e;
     }
   }