[Fix] nvm ls, nvm alias, nvm install: error when an LTS name is invalid

README.md

@@ -349,7 +349,7 @@ In place of a version pointer like "14.7" or "16.3" or "12.22.1", you can use th
 
 ### Long-term Support
 
-Node has a [schedule](https://github.com/nodejs/Release#release-schedule) for long-term support (LTS) You can reference LTS versions in aliases and `.nvmrc` files with the notation `lts/*` for the latest _Active_ LTS, and `lts/argon` for LTS releases from the "argon" line, for example. In addition, the following commands support LTS arguments:
+Node has a [schedule](https://github.com/nodejs/Release#release-schedule) for long-term support (LTS) You can reference LTS versions in aliases and `.nvmrc` files with the notation `lts/*` for the latest LTS, and `lts/argon` for LTS releases from the "argon" line, for example. In addition, the following commands support LTS arguments:
 
   - `nvm install --lts` / `nvm install --lts=argon` / `nvm install 'lts/*'` / `nvm install lts/argon`
   - `nvm uninstall --lts` / `nvm uninstall --lts=argon` / `nvm uninstall 'lts/*'` / `nvm uninstall lts/argon`

nvm.sh

@@ -700,12 +700,10 @@ nvm_ensure_version_installed() {
       nvm_err "N/A: version \"${PREFIXED_VERSION:-$PROVIDED_VERSION}\" is not yet installed."
     fi
     nvm_err ""
-    if [ "${PROVIDED_VERSION}" = 'lts' ]; then
-      nvm_err '`lts` is not an alias - you may need to run `nvm install --lts` to install and `nvm use --lts` to use it.'
-    elif [ "${IS_VERSION_FROM_NVMRC}" != '1' ]; then
-      nvm_err "You need to run \`nvm install ${PROVIDED_VERSION}\` to install and use it."
-    else
-      nvm_err 'You need to run `nvm install` to install and use the node version specified in `.nvmrc`.'
+    if [ "${IS_VERSION_FROM_NVMRC}" != '1' ]; then
+        nvm_err "You need to run \`nvm install ${PROVIDED_VERSION}\` to install and use it."
+      else
+        nvm_err 'You need to run `nvm install` to install and use the node version specified in `.nvmrc`.'
     fi
     return 1
   fi

test/slow/nvm use/Running 'nvm use lts' shows actionable error

@@ -1,19 +0,0 @@
-#!/bin/sh
-
-set -ex
-
-die () { echo "$@" ; exit 1; }
-
-\. ../../../nvm.sh
-
-# Deactivate any active node version
-nvm deactivate >/dev/null 2>&1 || die 'deactivate failed'
-
-# Attempt to use 'lts' without '--' and capture the error message
-ERROR_OUTPUT=$(nvm use lts 2>&1) || true
-
-EXPECTED_ERROR='`lts` is not an alias - you may need to run `nvm install --lts` to install and `nvm use --lts` to use it.'
-
-# Check if the error message matches the expected output
-echo "$ERROR_OUTPUT" | grep -q "$EXPECTED_ERROR" \
-  || die "Expected error message not found. Got: $ERROR_OUTPUT"