fix tag handling

Author: blink1073

.evergreen/generated_configs/variants.yml

@@ -162,62 +162,23 @@ buildvariants:
   # Compression tests
   - name: compression-snappy-rhel8
     tasks:
-      - name: .
-      - name: c
-      - name: o
-      - name: m
-      - name: p
-      - name: r
-      - name: e
-      - name: s
-      - name: s
-      - name: i
-      - name: o
-      - name: n
+      - name: .compression
     display_name: Compression snappy RHEL8
     run_on:
       - rhel87-small
     expansions:
       COMPRESSOR: snappy
   - name: compression-zlib-rhel8
     tasks:
-      - name: .
-      - name: c
-      - name: o
-      - name: m
-      - name: p
-      - name: r
-      - name: e
-      - name: s
-      - name: s
-      - name: i
-      - name: o
-      - name: n
+      - name: .compression
     display_name: Compression zlib RHEL8
     run_on:
       - rhel87-small
     expansions:
       COMPRESSOR: zlib
   - name: compression-zstd-rhel8
     tasks:
-      - name: .
-      - name: c
-      - name: o
-      - name: m
-      - name: p
-      - name: r
-      - name: e
-      - name: s
-      - name: s
-      - name: i
-      - name: o
-      - name: n
-      - name: " "
-      - name: "!"
-      - name: .
-      - name: "4"
-      - name: .
-      - name: "0"
+      - name: .compression !.4.0
     display_name: Compression zstd RHEL8
     run_on:
       - rhel87-small

.evergreen/scripts/generate_config.py

@@ -429,7 +429,7 @@ def create_compression_variants():
     variants = []
     for compressor in "snappy", "zlib", "zstd":
         expansions = dict(COMPRESSOR=compressor)
-        tasks = base_task if compressor != "zstd" else f"{base_task} !.4.0"
+        tasks = [base_task] if compressor != "zstd" else [f"{base_task} !.4.0"]
         display_name = get_variant_name(f"Compression {compressor}", host)
         variants.append(
             create_variant(