Improve uninstall error message for missing versions

Include the requested version in the uninstall error output when

the target is not installed.

Add a fast test to lock the behavior.

Close #3767

nvm.sh

@@ -3750,7 +3750,13 @@ nvm() {
       fi
 
       if ! nvm_is_version_installed "${VERSION}"; then
-        nvm_err "${VERSION} version is not installed..."
+        local REQUESTED_VERSION
+        REQUESTED_VERSION="${PATTERN}"
+        if [ "_${VERSION}" != "_N/A" ] && [ "_${VERSION}" != "_${PATTERN}" ]; then
+          nvm_err "Version '${VERSION}' (inferred from ${PATTERN}) is not installed."
+        else
+          nvm_err "Version '${REQUESTED_VERSION}' is not installed."
+        fi
         return
       fi
 

test/fast/Running 'nvm uninstall' with an inferred version shows the inferred message

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+set -ex
+
+\. ../../nvm.sh
+\. ../common.sh
+
+VERSION='v0.0.1'
+PATTERN='0.0'
+
+mkdir -p "${NVM_DIR}/${VERSION}"
+
+set +ex # needed for stderr
+RETURN_MESSAGE="$(nvm uninstall "${PATTERN}" 2>&1 || echo)"
+set -ex
+EXPECTED_MESSAGE="Version '${VERSION}' (inferred from ${PATTERN}) is not installed."
+
+[ "${RETURN_MESSAGE}" = "${EXPECTED_MESSAGE}" ]

test/fast/Running 'nvm uninstall' with an uninstalled version shows the requested version

@@ -0,0 +1,13 @@
+#!/bin/sh
+
+set -ex
+
+\. ../../nvm.sh
+\. ../common.sh
+
+set +ex # needed for stderr
+RETURN_MESSAGE="$(nvm uninstall 22 2>&1 || echo)"
+set -ex
+EXPECTED_MESSAGE="Version '22' is not installed."
+
+[ "${RETURN_MESSAGE}" = "${EXPECTED_MESSAGE}" ]

test/fast/Running 'nvm-exec' should display required node version

@@ -5,7 +5,6 @@ set -x
 \. ../../nvm.sh
 
 cleanup() { rm -f .nvmrc; }
-
 die () { echo "$@" ; cleanup ; exit 1; }
 
 NVM_TEST_VERSION=v0.42