diff --git a/clang/test/Driver/riscv-arch.c b/clang/test/Driver/riscv-arch.c
--- a/clang/test/Driver/riscv-arch.c
+++ b/clang/test/Driver/riscv-arch.c
@@ -425,8 +425,7 @@
 // RUN: %clang --target=riscv32-unknown-elf -march=rv32izbt0p1 -menable-experimental-extensions -### %s \
 // RUN: -fsyntax-only 2>&1 | FileCheck -check-prefix=RV32-EXPERIMENTAL-BADVERS %s
 // RV32-EXPERIMENTAL-BADVERS: error: invalid arch name 'rv32izbt0p1'
-// RV32-EXPERIMENTAL-BADVERS: unsupported version number 0.1 for experimental extension
-// RV32-EXPERIMENTAL-BADVERS: 'zbt'(this compiler supports 0.93)
+// RV32-EXPERIMENTAL-BADVERS: unsupported version number 0.1 for experimental extension 'zbt' (this compiler supports 0.93)
 
 // RUN: %clang --target=riscv32-unknown-elf -march=rv32izbt0p93 -menable-experimental-extensions -### %s \
 // RUN: -fsyntax-only 2>&1 | FileCheck -check-prefix=RV32-EXPERIMENTAL-GOODVERS %s
diff --git a/llvm/lib/Support/RISCVISAInfo.cpp b/llvm/lib/Support/RISCVISAInfo.cpp
--- a/llvm/lib/Support/RISCVISAInfo.cpp
+++ b/llvm/lib/Support/RISCVISAInfo.cpp
@@ -406,8 +406,8 @@
       if (!MinorStr.empty())
         Error += "." + MinorStr.str();
       Error += " for experimental extension '" + Ext.str() +
-               "'(this compiler supports " + utostr(SupportedVers.Major) + "." +
-               utostr(SupportedVers.Minor) + ")";
+               "' (this compiler supports " + utostr(SupportedVers.Major) +
+               "." + utostr(SupportedVers.Minor) + ")";
       return createStringError(errc::invalid_argument, Error);
     }
     return Error::success();