Ensuring no embedded spaces in multiline string

configmap.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: fluent-bit-config
  namespace: fluent-bit
  labels:
    k8s-app: fluent-bit
data:

overlay.yaml

#@ load("@ytt:data", "data")
#@ load("@ytt:overlay", "overlay")

#@overlay/match by=overlay.subset({"kind":"ConfigMap"}), expects=1
---
data:
  #@yaml/text-templated-strings
  #@overlay/replace
  fluent-bit.conf: |
    (@= data.values.fluent_bit.config.service -@)
      Parsers_File  parsers.conf
    (@= "  Plugins_File  plugins.conf" if data.values.fluent_bit.config.plugins else "" -@)
    (@= "  Streams_File  streams.conf" if data.values.fluent_bit.config.streams else "" -@)
    @INCLUDE inputs.conf
    @INCLUDE filters.conf
    @INCLUDE outputs.conf
  #@yaml/text-templated-strings
  #@overlay/replace
  outputs.conf: (@= data.values.fluent_bit.config.outputs @)
  #@yaml/text-templated-strings
  #@overlay/replace
  inputs.conf: (@= data.values.fluent_bit.config.inputs @)
  #@yaml/text-templated-strings
  #@overlay/replace
  filters.conf: (@= data.values.fluent_bit.config.filters @)
  #@yaml/text-templated-strings
  #@overlay/replace
  parsers.conf: (@= data.values.fluent_bit.config.parsers @)
  #@yaml/text-templated-strings
  #@overlay/replace
  streams.conf: (@= data.values.fluent_bit.config.streams @)
  #@yaml/text-templated-strings
  #@overlay/replace
  plugins.conf: (@= data.values.fluent_bit.config.plugins @)

values.yaml

#@data/values
#@overlay/match-child-defaults missing_ok=True
---
namespace: "fluent-bit"
#! Required params for supported output plugins
fluent_bit:
  config:
    #! https://docs.fluentbit.io/manual/administration/configuring-fluent-bit/variables
    outputs: |
      [OUTPUT]
        Name              stdout
        Match             *
    inputs: |
      [INPUT]
        Name tail
        Path /var/log/containers/*.log
        Parser docker
        Tag kube.*
        Mem_Buf_Limit 5MB
        Skip_Long_Lines On
      [INPUT]
        Name systemd
        Tag host.*
        Systemd_Filter _SYSTEMD_UNIT=kubelet.service
        Read_From_Tail On
    service: |
      [Service]
        Flush         1
        Log_Level     info
        Daemon        off
        Parsers_File  parsers.conf
        HTTP_Server   On
        HTTP_Listen   0.0.0.0
        HTTP_Port     2020
    filters: |
      [FILTER]
        Name                kubernetes
        Match               kube.*
        Kube_URL            https://kubernetes.default.svc:443
        Kube_CA_File        /var/run/secrets/kubernetes.io/serviceaccount/ca.crt
        Kube_Token_File     /var/run/secrets/kubernetes.io/serviceaccount/token
        Kube_Tag_Prefix     kube.var.log.containers.
        Merge_Log           On
        Merge_Log_Key       log_processed
        K8S-Logging.Parser  On
        K8S-Logging.Exclude On
    parsers: |
      # see https://github.com/fluent/fluent-bit/blob/v1.7.5/conf/parsers.conf
      [PARSER]
        Name   apache
        Format regex
        Regex  ^(?<host>[^ ]*) [^ ]* (?<user>[^ ]*) \[(?<time>[^\]]*)\] "(?<method>\S+)(?: +(?<path>[^\"]*?)(?: +\S*)?)?" (?<code>[^ ]*) (?<size>[^ ]*)(?: "(?<referer>[^\"]*)" "(?<agent>[^\"]*)")?$
        Time_Key time
        Time_Format %d/%b/%Y:%H:%M:%S %z

    streams: ""
    plugins: ""
  #! optional configuration for the daemonset
  daemonset:
    resources: { }
    #! limits:
    #!   cpu: 100m
    #!   memory: 128Mi
    #! requests:
    #!   cpu: 100m
    #!   memory: 128Mi
    podAnnotations: { }
    podLabels: { }