Change "Labels" to "labels" to reduce confusion. (#2669)

Author: chrisdembia

OpenSim/Common/FileAdapter.h

@@ -93,7 +93,7 @@ class UnexpectedColumnLabel : public IOError {
                           const std::string& expected,
                           const std::string& received) :
         IOError(file, line, func) {
-        std::string msg = "Error reading column Labels in file '" + filename;
+        std::string msg = "Error reading column labels in file '" + filename;
         msg += "'. Unexpected column label. ";
         msg += "Expected = " + expected + ". ";
         msg += "Received = " + received + ". ";

OpenSim/Common/TRCFileAdapter.h

@@ -122,7 +122,7 @@ class IncorrectNumColumnLabels : public IOError {
                              size_t expected,
                              size_t received) :
         IOError(file, line, func) {
-        std::string msg = "Error reading column Labels in file '" + filename;
+        std::string msg = "Error reading column labels in file '" + filename;
         msg += "'. Unexpected number of column labels. ";
         msg += "Expected = " + std::to_string(expected) + ". ";
         msg += "Recieved = " + std::to_string(received) + ".";