打印语句，方括号的第一个字符不输出

Question

在新的（对我来说）环境中使用sqlcmd会产生一些奇怪的结果。使用print语句时，第一个字符是方括号（即[]）它不会打印。我的测试如下。

print "statement bug - square bracket as first character -  bit printed but     [test] missing"
-- :r "test.print.sql"
:out "test.print.txt"

print "first character is [ with matching ]";
print "[test]bit"   
print "[test]bit";  
print '[test]bit'   
print '[test]bit';   

print "first character is [ without matching ]";
print "[test bit"   
print "[test bit";  
print '[test bit'   
print '[test bit';   

print "first character is [ without matching ] no text";
print "["   
print "[";  
print '['   
print '[';   

print "first character is space = all ok";    
print " [test]bit"   
print " [test]bit";  
print ' [test]bit'   
print ' [test]bit';   

print "last character is space ";
print "[test]bit "   
print "[test]bit ";  
print '[test]bit '   
print '[test]bit ';   

print "()";
print "(test)bit "   
print "(test)bit ";  
print '(test)bit '   
print '(test)bit ';   

print "{}";
print "{test}bit "   
print "{test}bit ";  
print '{test}bit '   
print '{test}bit ';   

go
:out stdout

输出如下：

statement bug - square bracket as first character -  bit printed but [test] missing
first character is [ with matching ]
bit
bit
bit
bit
first character is [ without matching ]
[Microsoft][SQL Server Native Client 11.0][SQL Server][test bit
[Microsoft][SQL Server Native Client 11.0][SQL Server][test bit
[Microsoft][SQL Server Native Client 11.0][SQL Server][test bit
[Microsoft][SQL Server Native Client 11.0][SQL Server][test bit
first character is [ without matching ] no text
[Microsoft][SQL Server Native Client 11.0][SQL Server][
[Microsoft][SQL Server Native Client 11.0][SQL Server][
[Microsoft][SQL Server Native Client 11.0][SQL Server][
[Microsoft][SQL Server Native Client 11.0][SQL Server][
first character is space = all ok
 [test]bit
 [test]bit
 [test]bit
 [test]bit
last character is space 
bit 
bit 
bit 
bit 
()
(test)bit 
(test)bit 
(test)bit 
(test)bit 
{}
{test}bit 
{test}bit 
{test}bit 
{test}bit 

2008R2和2012（SP1）下的结果相同。并且直接触发命令而不使用：run /：out to file wrapper。