Clarify few verbose messages.

Dan pointed out to me earlier that he wants both short- and
verbose messages to be independently understandable. So modifying
some verbose messages to be easier to understand without the short
message.

lib/checkother.cpp

@@ -2731,9 +2731,9 @@ void CheckOther::sprintfOverlappingDataError(const Token *tok, const std::string
 {
     reportError(tok, Severity::error, "sprintfOverlappingData",
                 "Undefined behavior: variable is used as parameter and destination in s[n]printf().\n"
-                "The variable '" + varname + "' is used both as parameter and destination in "
-                "and destination buffer overlap. Quote from glibc (C-library) documentation "
-                "(http://www.gnu.org/software/libc/manual/html_mono/libc.html#Formatted-Output-Functions): "
+                "The variable '" + varname + "' is used both as a parameter and as a destination in "
+                "s[n]printf(). The origin and destination buffers overlap. Quote from glibc (C-library) "
+                "documentation (http://www.gnu.org/software/libc/manual/html_mono/libc.html#Formatted-Output-Functions): "
                 "'If copying takes place between objects that overlap as a result of a call "
                 "to sprintf() or snprintf(), the results are undefined.'");
 }
@@ -2846,8 +2846,9 @@ void CheckOther::sizeofsizeofError(const Token *tok)
 {
     reportError(tok, Severity::warning,
                 "sizeofsizeof", "Calling sizeof for 'sizeof'.\n"
-                "This is suspicious code and most likely there should be just"
-                "one 'sizeof'. The current code is equivalent to 'sizeof(size_t)'");
+                "Calling sizeof for 'sizeof looks like a suspicious code and "
+                "most likely there should be just one 'sizeof'. The current "
+                "code is equivalent to 'sizeof(size_t)'");
 }
 
 void CheckOther::sizeofCalculation()
@@ -2901,6 +2902,7 @@ void CheckOther::assignmentInAssertError(const Token *tok, const std::string &va
 {
     reportError(tok, Severity::warning,
                 "assignmentInAssert", "Assert statement modifies '" + varname + "'.\n"
+                "Variable '" + varname + "' is modified insert assert statement. "
                 "Assert statements are removed from release builds so the code inside "
                 "assert statement is not run. If the code is needed also in release "
                 "builds this is a bug.");

lib/checkpostfixoperator.cpp

@@ -101,6 +101,7 @@ void CheckPostfixOperator::postfixOperatorError(const Token *tok)
 {
     reportError(tok, Severity::performance, "postfixOperator",
                 "Prefer prefix ++/-- operators for non-primitive types.\n"
+                "Prefix ++/-- operators should be preferred for non-primitive types. "
                 "Pre-increment/decrement can be more efficient than "
                 "post-increment/decrement. Post-increment/decrement usually "
                 "involves keeping a copy of the previous value around and "

lib/checkstl.cpp

@@ -724,6 +724,7 @@ void CheckStl::stlBoundriesError(const Token *tok, const std::string &container_
 {
     reportError(tok, Severity::error, "stlBoundries",
                 "Dangerous container iterator compare using < operator for " + container_name + "\n"
+                "Container '" + container_name + "' iterator compared with < operator. "
                 "Using < operator with container type iterators is dangerous since the order of "
                 "the items is not guaranteed. One should use != operator instead when comparing "
                 "iterators in the container.");
@@ -782,6 +783,7 @@ void CheckStl::if_findError(const Token *tok, bool str)
     if (str)
         reportError(tok, Severity::warning, "stlIfStrFind",
                     "Suspicious checking of string::find() return value.\n"
+                    "Checking of string::find() return value looks Suspicious. "
                     "string::find will return 0 if the string is found at position 0. "
                     "If that is wanted to check then string::compare is a faster alternative "
                     "because it doesn't scan through the string.");
@@ -870,6 +872,7 @@ void CheckStl::sizeError(const Token *tok)
     const std::string varname(tok ? tok->str().c_str() : "list");
     reportError(tok, Severity::performance, "stlSize",
                 "Possible inefficient checking for '" + varname + "' emptiness.\n"
+                "Checking for '" + varname + "' emptiness might be inefficient. "
                 "Using " + varname + ".empty() instead of " + varname + ".size() can be faster. " +
                 varname + ".size() can take linear time but " + varname + ".empty() is "
                 "guaranteed to take constant time.");
@@ -907,7 +910,9 @@ void CheckStl::redundantCondition()
 
 void CheckStl::redundantIfRemoveError(const Token *tok)
 {
-    reportError(tok, Severity::style, "redundantIfRemove", "Redundant checking of STL container element.\n"
+    reportError(tok, Severity::style, "redundantIfRemove",
+                "Redundant checking of STL container element.\n"
+                "Redundant checking of STL container element existence before removing it. "
                 "The remove method in the STL will not do anything if element doesn't exist");
 }